Specifications

1068
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S6
Conditions: This symptom is observed when you configure OSPF with at least one network, and then
unconfigure it.
Workaround: There is no workaround.
ISO CLNS
• CSCei58655
Symptoms: A route that fails remains in the routing table with its old metric, preventing an alternate
route from being used and causing a routing loop.
Conditions: This symptom is observed in a network that is configured for IS-IS and iSPF when the
IP routes that are advertised in an LSP (irrespective of whether or not the LSP is fragmented) do not
age-out during a rerouting failure.
Workaround: Remove iSPF from the IS-IS process by entering the router isis command followed
by the no ispf command.
Miscellaneous
• CSCdz83100
Symptoms: High CPU use may occur at the interrupt level on an ingress port adapter or line card
that is configured for hardware multicast when there is a high multicast traffic rate.
Conditions: This symptom is observed when policy-based routing (PBR) matches the multicast
traffic and when a switchover to another interface occurs.
Workaround: Change the deny statement in the PBR configuration so traffic for multicast destination
addresses is denied earlier.
Alternate Workaround: For a short while, remove the PBR configuration from the ingress interface
to enable multicast traffic hardware forwarding to be established.
Further Problem Description: PBR should not influence multicast traffic and it does not when traffic
is switched in the hardware. When a switchover to a new interface occurs, multicast packets are
initially forwarded in the software until hardware forwarding can take over. PBR interferes with the
initial software-switched packets and prevents hardware entries from being created.
• CSCeb06452
Symptoms: When multicast IP version 6 (IPv6) Cisco Express Forwarding (CEF) is enabled, packets
(greater than or equal to 232 bytes) that are forwarded may be corrupted.
Conditions: This symptom is observed on all Cisco platforms during normal multicast CEF software
forwarding.
Workaround: Use process switching.
• CSCed66490
Symptoms: When all the physical links of a multilink bundle go down, the bundle bandwidth is set
to zero. This situation has two known consequences:
1. The distributed CBWFQ that is applied on a multilink bundle causes a VIP to crash.
2. OSPF is unable to calculate the interface cost correctly and generates an error message.
Conditions: These symptoms are observed on a Cisco 7500 series and Cisco 7600 series that are
configured for distributed multilink PPP or distributed multilink Frame Relay.
Workaround: There is no workaround.